| 摘要 |
Self calibrating a pyrometer includes taking two different temperatures thereby generating two voltage spectra, calculating the spectra ratio R of the two voltage spectra, determining the slope of the plot of the logarithm of the spectrum ratio versus c2/ lambda to arrive at a relationship between T1 and T2, solving for T1 within the spectra ratio, and arriving at a value for T2 by substituting experimentally measured values for R into the spectra ratio equation. This method is then repeated for the determination of T2. The pyrometer calibration constant h lambda can then be determined by dividing the measured voltage spectra by the planck function at the known temperature (i.e., T1 or T2). Measurement of subsequent temperatures can now be determined by measuring the voltage spectra and dividing by the calibration constant h lambda which will result in a planck function L lambda (T) which can be solved to yield the surface temperature.
|
